Biomass derived Nanoporous Carbon Based Electrodes for High Performance Symmetric Supercapacitor

The high performance symmetric supercapacitor electrodes were fabricated using peanut shell activated porous carbon synthesized by chemical activation method. The textural and surface morphology were analysed. The Electrochemical studies of fabricated electrodes were investigated by 6M KOH as an aqueous electrolyte using two electrodes system. From charge-discharge process, gravimetric capacitance and volumetric capacitance values were calculated such as 160 Fg-1 and 116.8 Fcm-3 at current density of 1 Ag-1 in 6M KOH solution .Energy density and Power density values were calculated as 5.5 WhKg-1 for 1 Ag-1 and 4 KwKg-1 for 10 Ag-1 respectively. This electrode has excellent cyclic stability and has revealed 80% capacitance retention even after 8,000 charge/discharge cycles at 1 Ag-1 . The result clearly demonstrated that the natural resource of specific biomass could be an economic, eco-friendly and alternative raw material for supercapacitor electrodes with efficient volumetric Energy and Power density